Steam-boiler.



C. 0. MYHRE.

STEAM BOILER.

APPLICATION FILED MAY 26. 1914.

Patented J My 11, 1916.

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, these domes being in posi ion I UNIT CHRIS O. MYHRE, OF ESMOND, NORTH DAKOTA.

STEAM-BOILER.

Specification of Letters Patent.

Patented July 11, 1916.

Application filed May 26, 1914. Serial No. 841,061.

T 0 all whom it may concern:

Be it known that I, CHRIS O. MYHRE, a citizen of the United States, residing at Esmond, in the county of Benson, State of North Dakota, have invented certain new and useful Improvements in Steam-Boilers; and I do hereby declare the following to be a full, clear and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to certain novel and useful improvements in steam boilers, and has particular application to a traction engine boiler wherein dry steam for the engine is taken from the high end of the boiler whether the engine be going up or down hill.

My invention consists in the construction, combination and arrangement of parts set forth in and falling within the scope of the appended claim.

In the accompanying drawings: Figure 1 is a longitudinal view partly in section and partly in elevation of a steam boiler having my invention employed in connection therewith, such boiler being shown in the tilted position assumed during the advance up a hill. Fig. 2 is a vertical cross sectional view taken on the line 22 of Fig. 1. v 7

It is known that duringthe passage of a traction engine over a grade, more or less water will find its way into the engine cylinders, this water carryingwith it a certain amount of sediment which corrodes the cylinder walls and moreover diminishes the efficiency of the engine. To prevent an occurrence of this kind I provide a steam boiler 10 having spaced steam domes 11-11 arranged adjacent to its opposite ends, one of to take steam from the highest end of the boiler according to the direction in which the boiler slopes. In order to lead dry steam from that dome which is highest when the boiler is tilted, I provide a steam pipe 12, the intermediate portion of which lies along the inner wall of the boiler shell, and the extremities 13 of which are bent abruptly and passed along the inner walls of both domes, the extreme end portions 14: of the pipe passing through the tops of both domes and thence being bent abruptly along the tops of the domes and finally bent downwardly and again passed into the interior of the domes. It will be clear that the intake ends of the pipe illustrated are similar in construction,

will by the fact of their entering the tops or heads of the domes, take steam from the highest possible point above the water level in the boiler.

The steam entering the steam pipe 12 is led therefrom by an outlet pipe 15 which passes into the smoke box of the boiler and then extends upward through the smoke stack of the boiler as is clearly shown in Fig. 1, the opposite end 16 of this pipe being thence passed out through the smoke. stack and led to the cylinders in any desired manner. It is deemed of importance in the present case that the steam pipe 12, with'the exception of its extreme end portions, and also the out-let pipe 15, should be entirely concealed or located within the boiler, for by th1s construction the dry steam within the steam and outlet pipes will be maintained in its heated state and will not be subjected to the cooling and condensation which usually results from disposing the dome connecting pipe and the steam outlet pipe exteriorly of the boiler.

' The exposed portions of' the steam pipe, or those portions which extend directly over thetops of the steam domes are with valves V-V, these valves being of any ordinary construction. As the valves a description of one will suflice forboth. Each valve includes a valve casing 18communicating at opposite sides with the steam pipe. WVithin this valve casing is seated and adapted to rotate a plug valve-19 formed with a central steam passage 20, which is adapted by the turning of the plug to be brought into register with the steam pipe to permit the passage of steam from one section of the pipe through the plug to the opposite section thereof, the steam being shut off when the plug is turned to move the passage 20 out of register with the steam pipe. This plug valve is further provided with a small circumferential groove 20 which permits a small amount of steam to leak or bleed through the valve-so that the steam pipe will be kept dry and free from water of condensation. Each plug valve is equipped with a stem 21 extending through the top of the casing, the upper end of this stem carrying a lever arm 22, the outer end of which is bifurcated and has connected therewith the pull or operating rod 23. This pull rod which extends longitudinally of the boiler is passed through the bifurcaprovided tion of both the lever and arms 22, as will be readily seen by reference to Fig. 1 and is pivotally connected to these ends of the levers by pivot pins 24. One end portion of this pull rod extends considerably beyond the rear dome and terminates in a hand loop 25 by means of which the rod may be manipulated or shoved forwardly and pulled rearwardly. The bracket arm 26 is attached I disposed at right angles to to the rear dome and is formed at its upper end with a guide eye 27 through which the operating or pull rod 23 passes, and by which it is supported. The two plug valves are, of course, adjusted within their casings as concerns their steam passages or ports 20, that when the passage of one valve is in position to admit of the flow of steam therethrough, the passage of the other valve is the pipe or in its cut off position. Thus it will be seen that when one valve is open, the other valve is closed Extending rearward of the boiler from the pipe 12 and projecting through the shell of the boiler is a drain pipe 28, the outer end of which is provided with a drain cock 29 in easy reach of the engineer, which cock may be operated to drain the pipe 12. Likewise, the forward section 15 of the steam pipe has connected therewith a short drain pipe 30 which projects downwardly and thence laterally and passes through the side wall of the boiler shell, this drain pipe having at its outer end a drain cock 31 operable by a rod 32 which is supported and guided by brackets 3333 fastened to the side of the boiler. This operating rod 32, it

will be seen, extends longitudinally of the outside of the boiler and at its rear end is provided with a hand lever 34 for operating the rod to open and close the drain cock 31. The exposedsections of the steam pipe 12, or those sections which extend above the steam domes are provided with cut off valves 35 located between the throttle valves VV and the ends of the pipes which project into the steam dome.

\Vhile I have herein shown and described one particular embodiment of my invention, I wish it to be understood that I do not confine myself to all the precise details of construction herein set forth by way of illustration as modification andvariation may be made without departing from the spirit of the invention or exceeding the scope of the appended claim.

lVhat I claim is:

The combination with a steam boiler having a steam dome adjacent to each end of said boiler, of a steam pipe arranged within said boiler and having portions extending vertically through said domes, and projecting horizontally above and entering the heads of said domes, valves arranged within the horizontal portions of said steam pipe and formed with rotatable plugs having steam passages adapted to register with the said horizontal pipe portions, stems connected to said valves, a manually operable rod connected to said stem for simultane ously closing one valve' and opening the other of said valves.

In testimony whereof, I afiix my signature, in the presence of tWo witnesses.

CHRIS O. MYHRE.

lVitnesses HARRIs THOMPSON, ELLING KARLsBRAATEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

